Corning Inc's Sell recommendation, which was recently downgraded from a Hold to Sell, is the outcome of a process of analysis that is proprietary and produced results that were below average outcomes in 4 areas: a ranking in its sector group that is in the bottom quarter, ranking in its industry group that is in the bottom quarter, analytical scoring that is well below average, and a quantitative risk/reward calculation that is average; and produced above average in 2 areas: an economic sector rated above average in attractiveness, and an industry group ranked above average in attractiveness.

GLW is rated as a Hold by means of the Portfolio Grader stock evaluator. This analytical tool evaluates stocks by employing proprietary fundamental and quantitative metric based. GLW has recently seen its Portfolio Grader rating downgraded over the last month from a Buy to a Hold.